I have a stock 455 that has a set of small valve 400 heads (#45) on it & i have a set of 4x heads that i am thinkin about puting on it, what would i gain or lose with this thade?
__________________
69 lemans std.350 daily driver
68 firebird drag car 461
1.68 60'/7.49 8th@94mph
better every time
|